Crusher.



No. 689,360. I Patented Dec, l7.,,l90l.

' W. E. JOHNSON OBUSHER.

(Application filed May 25. 1901.)

(No Model.) 2 Shuts-Sheet I.

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No. 689,360. Patented Dec. l7, l90l. W. E. JOHNSON.

GRUSHER.

(Application filed May 25, 1901.) v (No Model.) 2 Shasta-sheet 2.

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UNITED STATES PATENT OFFICE.

WILLIAM E. JOHNSON, OF JOPLIN, MISSOURI.

CRUSHER.

.5PECIFICATION forming part of Letters Patent No. 689,360, dated December 17, 1901.

Application filed May 25, 1901.

To all whom it may concern.-

Be it known that I, WILLIAM E. JOHNSON, a citizen of the United States, and a resident of Joplin, in the county of Jasper and State of Missouri, have invented a new and Improved Crusher, of which the following is a full, clear, and exact description.

This invention relates to improvements in crushers for stone, or ore; and the object is to provide a direct-acting crusher having no parts except the jaws liable to great wear and in which the movable jaw has but a slight movement with no lostmotion and so constructed that adjustments may be made while the machine is running for crushing fine or coarse, thus resulting in a greater amount of i work in a given time than is possible with crushers that must be stopped for adjustment.

I will describe a crusher embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation on the line a: a: of Fig. 2 of a crusher embodying my invention. Fig. 2 is a rear elevation. Fig. 3 is aface view of the stationary jaw, and Fig. 4 is a broken face view of the movable jaw.

The frame of the machine comprises the side pieces 1, connected at the rear and at the bottom by a cross-piece 2 and at the front by an upright plate 3, upon which the fixed jaw 42 is arranged. The fixed jaw 4 has flanges 5 at its sides, which engage in channels formed in the side pieces 1, and these flanges are tapered from the center in both directions to the ends, and therefore the jaw may be reversed when desired.

Mounted to swing in the frame is ajaw 5 This jaw at its upper end has trunnions 6, which have bearings in boxes arranged on the side pieces 1. Attached to the jaw is a facing 7. The ends of this facing 7 are tapered or beveled, as indicated, so that the lower end may engage in a correspondinglytapered shoulder 8, formed on the jaw 5, and engaged at the upper end by bolts 9, having tapered portions to engage the taper or bevel of the jaw-facing.

Having hearings in the side pieces is a Serial No. 61,882. (No model.)

shaft 10, upon the central portion of which is formed an eccentric 11, and engaging with this eccentric portion is a pitman 12. This eccentric has a projection of about three-eighths of an inch, as the machine is only intended to have a movement of three-eighths of an inch at the bottom portion of the jaws, and the upper portion of the movable jaw has a movement of about one-eighth of an inch. Therefore the power required for crushing is reduced materially from the power required for machines having a greater throw. The eccentric-rod strap is formed partly by a casting 13, secured to the free portion of the eccentric-strap by clamping-bolts 14, and in this casting 13 is an oil-chamber 15, into which oil may'pass from a cup 16. On the shaft 10 are a fly-wheel 17 and a band-wheel 18.

Engaging with the jaw 5 is a thrust-block 19. The end of the thrust-block is concaved to engage with the convex portion of the jaw 5, and arranged between the thrust-block and the pitman-rod is an adjusting-wedge 20. This wedge is supported by links 21 and rods 22, with which the links are connected so as to swing, and the said rods pass upward through a cross-bar 23, and the screw-threaded portions of these rods 22 are engaged by adj usting-nuts 24.. Obviously by manipulating the nuts 2& the wedge may be raised or lowered to adjust the machine for fine or coarse crushing. It will be seen that the end of the block 19 engaging with the wedge is inclined to correspond to the downward and forward inclined surface of the wedge, and thus the block is prevented from falling out.

The pitman 12 has connected with it swinging links 25, which at the upper ends are ongaged with eyes 26, connected to the side pieces 1. I

A tension device for the movable jaw consists of a spring 27, connected at one end to the lower portion of the jaw and at the other end to the cross-piece 2. This tension device or spring also serves to move the movable jaw rearward. m

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a crusher, a fixed jaw, a swingingjaw, a shaft, an eccentric on said shaft, a pitman engaging with the eccentric, a thrust-block tween said inclined end of the block and the end ofthe pitman, swinging and adjustable hangers for said Wedge, and swinging hang- I5 ers for the pitman, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM E. JOHNSON.

Witnesses:

F. M. REDBURN, JOHN BAUER. 

